/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.integration;

import static org.junit.Assert.fail;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.iotdb.db.utils.EnvironmentUtils;
import org.apache.iotdb.jdbc.Config;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;

public class IoTDBDisableAlignIT {

  private static String[] sqls = new String[]{

      "SET STORAGE GROUP TO root.vehicle",
      "SET STORAGE GROUP TO root.other",

      "CREATE TIMESERIES root.vehicle.d0.s0 WITH DATATYPE=INT32, ENCODING=RLE",
      "CREATE TIMESERIES root.vehicle.d0.s1 WITH DATATYPE=INT64, ENCODING=RLE",
      "CREATE TIMESERIES root.vehicle.d0.s2 WITH DATATYPE=FLOAT, ENCODING=RLE",
      "CREATE TIMESERIES root.vehicle.d0.s3 WITH DATATYPE=TEXT, ENCODING=PLAIN",
      "CREATE TIMESERIES root.vehicle.d0.s4 WITH DATATYPE=BOOLEAN, ENCODING=PLAIN",

      "CREATE TIMESERIES root.vehicle.d1.s0 WITH DATATYPE=INT32, ENCODING=RLE",

      "CREATE TIMESERIES root.other.d1.s0 WITH DATATYPE=FLOAT, ENCODING=RLE",

      "insert into root.vehicle.d0(timestamp,s0) values(1,101)",
      "insert into root.vehicle.d0(timestamp,s0) values(2,198)",
      "insert into root.vehicle.d0(timestamp,s0) values(100,99)",
      "insert into root.vehicle.d0(timestamp,s0) values(101,99)",
      "insert into root.vehicle.d0(timestamp,s0) values(102,80)",
      "insert into root.vehicle.d0(timestamp,s0) values(103,99)",
      "insert into root.vehicle.d0(timestamp,s0) values(104,90)",
      "insert into root.vehicle.d0(timestamp,s0) values(105,99)",
      "insert into root.vehicle.d0(timestamp,s0) values(106,99)",
      "insert into root.vehicle.d0(timestamp,s0) values(2,10000)",
      "insert into root.vehicle.d0(timestamp,s0) values(50,10000)",
      "insert into root.vehicle.d0(timestamp,s0) values(1000,22222)",

      "insert into root.vehicle.d0(timestamp,s1) values(1,1101)",
      "insert into root.vehicle.d0(timestamp,s1) values(2,198)",
      "insert into root.vehicle.d0(timestamp,s1) values(100,199)",
      "insert into root.vehicle.d0(timestamp,s1) values(101,199)",
      "insert into root.vehicle.d0(timestamp,s1) values(102,180)",
      "insert into root.vehicle.d0(timestamp,s1) values(103,199)",
      "insert into root.vehicle.d0(timestamp,s1) values(104,190)",
      "insert into root.vehicle.d0(timestamp,s1) values(105,199)",
      "insert into root.vehicle.d0(timestamp,s1) values(2,40000)",
      "insert into root.vehicle.d0(timestamp,s1) values(50,50000)",
      "insert into root.vehicle.d0(timestamp,s1) values(1000,55555)",

      "insert into root.vehicle.d0(timestamp,s2) values(1000,55555)",
      "insert into root.vehicle.d0(timestamp,s2) values(2,2.22)",
      "insert into root.vehicle.d0(timestamp,s2) values(3,3.33)",
      "insert into root.vehicle.d0(timestamp,s2) values(4,4.44)",
      "insert into root.vehicle.d0(timestamp,s2) values(102,10.00)",
      "insert into root.vehicle.d0(timestamp,s2) values(105,11.11)",
      "insert into root.vehicle.d0(timestamp,s2) values(1000,1000.11)",

      "insert into root.vehicle.d0(timestamp,s3) values(60,'aaaaa')",
      "insert into root.vehicle.d0(timestamp,s3) values(70,'bbbbb')",
      "insert into root.vehicle.d0(timestamp,s3) values(80,'ccccc')",
      "insert into root.vehicle.d0(timestamp,s3) values(101,'ddddd')",
      "insert into root.vehicle.d0(timestamp,s3) values(102,'fffff')",

      "insert into root.vehicle.d1(timestamp,s0) values(1,999)",
      "insert into root.vehicle.d1(timestamp,s0) values(1000,888)",

      "insert into root.vehicle.d0(timestamp,s1) values(2000-01-01T08:00:00+08:00, 100)",
      "insert into root.vehicle.d0(timestamp,s3) values(2000-01-01T08:00:00+08:00, 'good')",

      "insert into root.vehicle.d0(timestamp,s4) values(100, false)",
      "insert into root.vehicle.d0(timestamp,s4) values(100, true)",

      "insert into root.other.d1(timestamp,s0) values(2, 3.14)",};

  @BeforeClass
  public static void setUp() throws Exception {
    EnvironmentUtils.closeStatMonitor();
    EnvironmentUtils.envSetUp();
    insertData();
  }

  @AfterClass
  public static void tearDown() throws Exception {
    EnvironmentUtils.cleanEnv();
  }

  private static void insertData() throws ClassNotFoundException {
    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {

      for (String sql : sqls) {
        statement.execute(sql);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  @Test
  public void selectTest() throws ClassNotFoundException {
    String[] retArray = new String[]{
        "1,101,1,1101,2,2.22,60,aaaaa,100,true,1,999,",
        "2,10000,2,40000,3,3.33,70,bbbbb,null,null,1000,888,",
        "50,10000,50,50000,4,4.44,80,ccccc,null,null,null,null,",
        "100,99,100,199,102,10.0,101,ddddd,null,null,null,null,",
        "101,99,101,199,105,11.11,102,fffff,null,null,null,null,",
        "102,80,102,180,1000,1000.11,946684800000,good,null,null,null,null,",
        "103,99,103,199,null,null,null,null,null,null,null,null,",
        "104,90,104,190,null,null,null,null,null,null,null,null,",
        "105,99,105,199,null,null,null,null,null,null,null,null,",
        "106,99,1000,55555,null,null,null,null,null,null,null,null,",
        "1000,22222,946684800000,100,null,null,null,null,null,null,null,null,",
    };

    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {
      boolean hasResultSet = statement.execute(
          "select * from root.vehicle disable align");
      Assert.assertTrue(hasResultSet);

      try (ResultSet resultSet = statement.getResultSet()) {
        ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
        List<Integer> actualIndexToExpectedIndexList = checkHeader(resultSetMetaData,
            "Timeroot.vehicle.d0.s0,root.vehicle.d0.s0,"
                + "Timeroot.vehicle.d0.s1,root.vehicle.d0.s1,"
                + "Timeroot.vehicle.d0.s2,root.vehicle.d0.s2,"
                + "Timeroot.vehicle.d0.s3,root.vehicle.d0.s3,"
                + "Timeroot.vehicle.d0.s4,root.vehicle.d0.s4,"
                + "Timeroot.vehicle.d1.s0,root.vehicle.d1.s0,",
            new int[]{Types.INTEGER, Types.BIGINT, Types.FLOAT, Types.VARCHAR, Types.BOOLEAN,
                Types.INTEGER});

        int cnt = 0;
        while (resultSet.next()) {
          String[] expectedStrings = retArray[cnt].split(",");
          StringBuilder expectedBuilder = new StringBuilder();
          StringBuilder actualBuilder = new StringBuilder();
          for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
            actualBuilder.append(resultSet.getString(i)).append(",");
            expectedBuilder.append(expectedStrings[actualIndexToExpectedIndexList.get(i - 1)])
                .append(",");
          }
          Assert.assertEquals(expectedBuilder.toString(), actualBuilder.toString());
          cnt++;
        }
        Assert.assertEquals(11, cnt);
      }
    } catch (Exception e) {
      e.printStackTrace();
      fail(e.getMessage());
    }
  }

  @Test
  public void selectWithDuplicatedPathsTest() throws ClassNotFoundException {
    String[] retArray = new String[]{
        "1,101,1,101,1,1101,",
        "2,10000,2,10000,2,40000,",
        "50,10000,50,10000,50,50000,",
        "100,99,100,99,100,199,",
        "101,99,101,99,101,199,",
        "102,80,102,80,102,180,",
        "103,99,103,99,103,199,",
        "104,90,104,90,104,190,",
        "105,99,105,99,105,199,",
        "106,99,106,99,1000,55555,",
        "1000,22222,1000,22222,946684800000,100,",
    };

    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {
      boolean hasResultSet = statement.execute(
          "select s0,s0,s1 from root.vehicle.d0 disable align");
      Assert.assertTrue(hasResultSet);

      try (ResultSet resultSet = statement.getResultSet()) {
        ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
        List<Integer> actualIndexToExpectedIndexList = checkHeader(resultSetMetaData,
            "Timeroot.vehicle.d0.s0,root.vehicle.d0.s0,"
                + "Timeroot.vehicle.d0.s0,root.vehicle.d0.s0,"
                + "Timeroot.vehicle.d0.s1,root.vehicle.d0.s1,",
            new int[]{Types.INTEGER, Types.INTEGER, Types.BIGINT});

        int cnt = 0;
        while (resultSet.next()) {
          String[] expectedStrings = retArray[cnt].split(",");
          StringBuilder expectedBuilder = new StringBuilder();
          StringBuilder actualBuilder = new StringBuilder();
          for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
            actualBuilder.append(resultSet.getString(i)).append(",");
            expectedBuilder.append(expectedStrings[actualIndexToExpectedIndexList.get(i - 1)])
                .append(",");
          }
          Assert.assertEquals(expectedBuilder.toString(), actualBuilder.toString());
          cnt++;
        }
        Assert.assertEquals(11, cnt);
      }
    } catch (Exception e) {
      e.printStackTrace();
      fail(e.getMessage());
    }
  }

  @Test
  public void selectLimitTest() throws ClassNotFoundException {
    String[] retArray = new String[]{
        "2,10000,1000,888,2,40000,3,3.33,70,bbbbb,null,null,",
        "50,10000,null,null,50,50000,4,4.44,80,ccccc,null,null,",
        "100,99,null,null,100,199,102,10.0,101,ddddd,null,null,",
        "101,99,null,null,101,199,105,11.11,102,fffff,null,null,",
        "102,80,null,null,102,180,1000,1000.11,946684800000,good,null,null,",
        "103,99,null,null,103,199,null,null,null,null,null,null,",
        "104,90,null,null,104,190,null,null,null,null,null,null,",
        "105,99,null,null,105,199,null,null,null,null,null,null,",
        "106,99,null,null,1000,55555,null,null,null,null,null,null,",
        "1000,22222,null,null,946684800000,100,null,null,null,null,null,null,",
    };

    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {
      boolean hasResultSet = statement.execute(
          "select s0,s1,s2,s3,s4 from root.vehicle.* limit 10 offset 1 disable align");
      Assert.assertTrue(hasResultSet);

      try (ResultSet resultSet = statement.getResultSet()) {
        ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
        List<Integer> actualIndexToExpectedIndexList = checkHeader(resultSetMetaData,
            "Timeroot.vehicle.d0.s0,root.vehicle.d0.s0,"
                + "Timeroot.vehicle.d1.s0,root.vehicle.d1.s0,"
                + "Timeroot.vehicle.d0.s1,root.vehicle.d0.s1,"
                + "Timeroot.vehicle.d0.s2,root.vehicle.d0.s2,"
                + "Timeroot.vehicle.d0.s3,root.vehicle.d0.s3,"
                + "Timeroot.vehicle.d0.s4,root.vehicle.d0.s4,",
            new int[]{Types.INTEGER, Types.INTEGER, Types.BIGINT, Types.FLOAT, Types.VARCHAR,
                Types.BOOLEAN});

        int cnt = 0;
        while (resultSet.next()) {
          String[] expectedStrings = retArray[cnt].split(",");
          StringBuilder expectedBuilder = new StringBuilder();
          StringBuilder actualBuilder = new StringBuilder();
          for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
            actualBuilder.append(resultSet.getString(i)).append(",");
            expectedBuilder.append(expectedStrings[actualIndexToExpectedIndexList.get(i - 1)])
                .append(",");
          }
          Assert.assertEquals(expectedBuilder.toString(), actualBuilder.toString());
          cnt++;
        }
        Assert.assertEquals(10, cnt);
      }
    } catch (Exception e) {
      e.printStackTrace();
      fail(e.getMessage());
    }
  }

  @Test
  public void selectSlimitTest() throws ClassNotFoundException {
    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {
      boolean hasResultSet = statement.execute(
          "select * from root.vehicle.* slimit 2 soffset 1 disable align");
      Assert.assertTrue(hasResultSet);

      try (ResultSet resultSet = statement.getResultSet()) {
        ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
        Assert.assertEquals(4, resultSetMetaData.getColumnCount());

        int cnt = 0;
        while (resultSet.next()) {
          cnt++;
        }
        Assert.assertEquals(11, cnt);
      }
    } catch (Exception e) {
      e.printStackTrace();
      fail(e.getMessage());
    }
  }

  @Test
  public void errorCaseTest1() throws ClassNotFoundException {
    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {
      boolean hasResultSet = statement.execute(
          "select * from root.vehicle where time = 3 Fill(int32[previous, 5ms]) disable align");
      fail("No exception thrown.");
    } catch (Exception e) {
      Assert.assertTrue(e.getMessage().contains(
          "Fill doesn't support disable align clause."));
    }
  }

  @Test
  public void errorCaseTest2() throws ClassNotFoundException {
    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {
      boolean hasResultSet = statement.execute(
          "select count(*) from root.vehicle GROUP BY ([2,50),20ms) disable align");
      fail("No exception thrown.");
    } catch (Exception e) {
      Assert.assertTrue(e.getMessage().contains("Group by doesn't support disable align clause."));
    }
  }

  @Test
  public void errorCaseTest3() throws ClassNotFoundException {
    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {
      boolean hasResultSet = statement.execute(
          "select count(*) from root disable align");
      fail("No exception thrown.");
    } catch (Exception e) {
      Assert.assertTrue(e.getMessage().contains(
          "Aggregation doesn't support disable align clause."));
    }
  }

  private List<Integer> checkHeader(ResultSetMetaData resultSetMetaData,
      String expectedHeaderStrings, int[] expectedTypes) throws SQLException {
    String[] expectedHeaders = expectedHeaderStrings.split(",");
    Map<String, Integer> expectedHeaderToTypeIndexMap = new HashMap<>();
    Map<String, Integer> expectedHeaderToColumnIndexMap = new HashMap<>();
    for (int i = 0; i < expectedHeaders.length; ++i) {
      if (i % 2 != 0) {
        expectedHeaderToTypeIndexMap.put(expectedHeaders[i], i / 2);
      }
      expectedHeaderToColumnIndexMap.put(expectedHeaders[i], i);
    }

    List<Integer> actualIndexToExpectedIndexList = new ArrayList<>();
    for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
      String columnName = resultSetMetaData.getColumnName(i);
      Integer typeIndex = expectedHeaderToTypeIndexMap.get(columnName);
      if (typeIndex != null) {
        Assert.assertEquals(expectedTypes[typeIndex], resultSetMetaData.getColumnType(1 + i / 2));
      }
      actualIndexToExpectedIndexList.add(expectedHeaderToColumnIndexMap.get(columnName));
    }
    return actualIndexToExpectedIndexList;
  }
}
